Planodraph co



W. H. SUMBLING.

RECTIFYING MACHINE FOR SHELLS.

APPLICATION FILED JUNE 8.19:8.

1,308, 1 25, Patented July 1, 1919.

THE COLUMBIA PLANOGRAPH C0,, WASHINGTON, D. C. v

UNITED STATES PATENT oFFIoE.

WILLIAM HENRY SUIVIIBLING, OF TORONTO, ONTARIO, CANADA.

RECTIFYING-MACHINE FOR SHELLS.

Specification of Lett e rs Patent.

Appficationfiled June 8, 1918. Serial No. 238,954. I

To all whom it may concern:

Be it known that I, WILLIAM HENRY SUM- BLING, a subject of the King of Great. Britain, of the city of Toronto, county of York, Province of Ontarlo, Canada, have invented certain new and useful Improvements 1n Rectifying-Machines for Shells, of whichthe following is a specification.

My invention relates to improvements in rectifying machines for shells, and one of the objects of my invention is to design a machine whereby the internal bottom of the forging will be smoothed out before the forging goes to the boring lathe so as to pre vent loss of time and material through breakage of the cutters and headcarrying the same, belonging to the boring-lathe. An-

other object of my invention is to utilize certain of the parts of my machine to rectify the internal bottom of theshell after it has been bored, but before the same has been nosed, so as to remove any roughness in the in dotted position. Fig. 8 is a vertical cross section through the base of the machine on the line 83, Fig. 1, showing, in elevation, the vise for clamping the forging firmly in place, and Fig. 4 is a horizontal longitudinal section through one end of the supporting. means for the spindle, showing the preferred construction therefor. h

In the drawings, like characters of reference refer to the same parts. a

It is well-known that shell-forgings are often made with the inner end of the bore very irregularly formed,- and the result is that when the forging is operated upon by the cutters in a boring-lathe, very often the cutters and the head supporting the same are absolutely ruined. The modernboring lathes used in boring shell-forgings run at high speed, and they are invariably auto matic in their action, and, therefore, the cutters very frequently jam in the irregularlties in the inner end of the bore, even though the machinist is givingcareful attention to his work, with the result that these cutters are badly damaged, and sometimes the shell forging is ruined. It is the object of my inyention to clean away all such irregularities in the inner end of the bore in the forging before the same is operated upon by the boring lathe, thus not only greatly reducing cost of maintenance of boring lathes, but also reducing to a minimum the danger of damaging the shell-forging. My rectifying machine, though very strongly built, does not cost as much to manufacture as a boring lathe, and the preliminary work to be done thereby is very quickly and accurately performed. i

A is the base of themachine, and carried thereby are two standards B and C in which is journaled the spindle D. This spindle is provided with any suitable cutter-head E carrying suitable cutters F. Supported by the standard 0 is a sleeve G which projects beyond one side thereof. The longitudinal axis of said sleeve is alined with the longitudinal axis of the spindle D so that this spindle will pass therethrough, and have bearing therein after any suitable manner as shown at 2 and 3. This sleeve G is preferably provided with a flange 43 through which passes'bolts 0 whereby the same is secured to the standard C through the medium of nuts 6 screwing on said bolts. To give additional support to the sleeve in the said standard, the sleeve projects Patented July 1, 1919.

throughsaid standard as shown at 7 and is firmly held therein. Of course, any other suitable means may be employed to support the said sleeve from said standard. A

8 is an internally-threaded nut, suitably fixed in the standard B, and operating through this nut. is an externally-threaded sleeve 9, the outer end of which is provided with suitable manipulating means such as a handwheel 10 keyed thereto. 11 is a collar carried by the outer end of the spindle 9 with which the manipulating means 10 coacts to withdrawthe spindle. As shown in Fig. 1, the spindle D passes through the sleeve 9, and although this spindle is shown as tubular in form, it maybe made solid.

A suitable vise is carried by l. the base A to clampthe forging 12 firmly 'inplace to prevent rotary movement thereof. This forging is placed over the sleeve G as shown clearly in Fig. 1 and in order to place it in the preferred form of clamping means,

which is in the form of a vise, the upper member or jaw 13 (which is pivoted to the lower jaw 14 carried by the base A by a bolt or equivalent means 15,) is uncoupled from said lower jaw and thrown upwardly around the bolt 15. After the forging has necessary. movement of the bolt 16. The nut 21 co-acts with the threaded end of the bolt 16 to lock the jaws 13 and 14 together.

As the forging 12 is. placed on the sleeve G, it is. moved until its tapered bore comes into. contact with the head" 22 of. the sleeve G.

To absolutely lock the forging 12, against longitudinaldisplacement during. the opera tion of the cutter F, a threaded locking-bar 23 is mounted in the plate 2.4. of a bracket 25. which is. pivoted at 26 to the base. A.

This locking-bar is provided with a handwheel 27, or equivalent means, to. manipulate the same. It will be observed that the longitudinal axis of the bar 23 is in alinement with the longitudinal axis of the forging 12 and consequently with the spindle D, when it occupies the position shown in Figs. 1 and 2. The bracket 25- permits the bar 23 to. be swung sidewise out of the path of movement of the forging 12. when the same is being placed and removed.

The inner end; of the head 22. is rounded or beveled! as shown at 2.8, and this fact, together with the further fact that the head 22;. is preferably hardened, prevents damage to the Sleeve GJ The inner end of the sleeve G- is preferablyireducedin external diameter so as to: form a flange 30 over which the head 22 passes, and: it is through this flange and head 22 that the fastening means such as a pin '29'is passed; The external diameter of the head 22. is. substantially the same as the external diameter of the sleeve G, which is less than the diameter of the bore of-the shell-forging 12.

In the construction of means shown and.

described" for supporting the cutter-head E,

it will be observed that this cutter-head is.

e keyed to. the spindle D. The pinion (Z has.

a considerably wider face than the face of the gear-wheel 6, so that these two wheels may be constantly in mesh notwithstanding the longitudinal reciprocating movement of the said" spindle D.

It will be observed that by reason of the sleeve G, the spindle l) is given proper support to prevent any other than longitudinal and rotary movement of the cutter-head E and its cutters.

To insure the absolute holding of the forging 12 in the vise or clamping means used, 11 provide the jaws 13 and 14 each with a pair of steel blocks 1, serrated on their inner edges, and which project beyond the inner face Of these laws.

By providing the manipulating means 10 o its equivalent, the operator has a very sensitive way of controlling the, longitudinal movement of the spindle D and cuttersF so that he will not j am, his cutters and so, break them.

In order to increase the. sensitiveness of the means for controlling the feed-spindle D, I prefer to provide an, ordinary type of thrust ballbearing g positioned between the. flange h of the, sleeve 9 and the, shoulder 71 f the spindl Th s. hrust ball-bearing"- Wi l pre ent t e b nd g, betwe n the spindle D. and the. sleeve. 9. when the cutt rs. F are in operation, which binding WOLIld have a tendency to feed the cutters automatically forward with more or less injurious. results. The use ofthe thrust ball-bearing or its equivalent adds to the sensitiveness, of the feed with beneficial results.

It will he observed upon referring to Fig. 8 particularly thatthe blocks 7 solely contact with the inner end of the f rgi g. 142 so that the forging will; be. positively held; against axial movement when firmly clamped between the jaws 1,8 and 145.

As will: be understood, the longitudinal axis of the. spindle. D passes. through the center ofthe space or opening between the,

jaws 13 and, 14-, and, since, the blocks 7 project an equal distance beyond the. jaws 13;

and. 14, andv further from the fact that as the. forging 12 is, placed on the sleeve G, when its tapered bore contacts-withthe head 22, the longitudinal axis of-the said: forging, will be held in alinement with the longitudinal axis of the spindle; D!

As before mentioned, one of the objects of my invention is to utilize my machine torectify any roughness in the bottom of the shell before nosing. In order to dothis, it is not necessary to. utilizethe locking-bur 23 nor its supporting bracket, nor isit necessary to use. the. thrust; ball-bearing before described, or its equivalent.

Claims:

1-. A shell-rectifying machine comprising a pair of standards spaced apart; means for rotatably holding theboring-bar in said standards comprising means in the rear standard for feeding the bar forward, and an elongated bushing located at the forward standard and carried thereby at one end,

the other end projecting into the bore of the work operated upon and supporting the boring-bar near its point of operation on the Work, and means for clamping the work in position on the machine.

2. A shell-rectifying machine comprising a pair of standards spaced apart; means for rotatably holding the boringbar in said standards comprising means in the rear standard for feeding the bar forward, and

an elongated bushing located at the 'forward standard and carried thereby at one end, the other end projecting into the bore of the Work operated upon and supporting the boring-bar near its point of operation on the work; means carried by the machine and positioned near its forward standard to clamp the work against turning, and means pivoted to the machine, and whereby the work is clamped against longitudinal displacement.

WILLIAM HENRY SUMBLING.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. G." 

